Not Able To Check For Nulls While Looping Through Input Columns
Mar 10, 2008
Hi,
I have an SSIS Package. I am using script component to loop through input columns and their values. I am not able to do Null checking. The code is as below. In place of dashes , I want to do null checking but am not able to do. I tried vbNull, IsNull, TypeOf, System.dbNull but nothing is working. I guess am missing something here. Can anyone help me with this.
For Each column In Me.ComponentMetaData.InputCollection(0).InputColumnCollection
columnValue = rowType.GetProperty(column.Name)
If Not --------------- Then
RowData += ((FormatElement(column.Name) + ReplaceSpecialChars(columnValue.GetValue(Row, Nothing).ToString()) + FormatElement(column.Name, True)))
End If
Next
Thanks in Advance.
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Apr 7, 2008
my stored procedure is
create procedure t1 (@a int,@b int,@c int,@d int,@e int,@f int)
as
begin
select no,name,department from emp where a = @a and b =@b orc =@c or
d = @d or e = @e or f = @f
end
my problem is while executing i may get null values as input to the stored procedure .
how to validate them ? any ideas .
are there any arrays.
if c and d are null then my condition would be
where a = @a and b =@b or e = @e or f = @f
how many loops shall i have to write.
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Jul 13, 2015
Basically I need to get the SUM of the sum of three columns and all three columns have nulls. To make it more complicated, the result set must return the top 20 in order desc as well.
I keep facing different issues whether I try and use Coalesce, IsNull, Sum, count, anything. My query never returns anything but 0 or NULL regardless of if I am trying to build a CTE or just use a query.
So I'm using Col A to get the TOP 20 in order (which is fine) but also trying to add together the sums of Col A + Col B + Col C for each of the twenty rows...
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May 24, 2008
I have a Stored Procedure as followsUSE [MyDataBase]
GO
/****** Object: StoredProcedure [dbo].[SPLogins] Script Date: 05/24/2008 21:58:50 ******/
SET ANSI_NULLS OFF
GO
SET QUOTED_IDENTIFIER ON
GO
Create PROCEDURE [dbo].[SPLogins]
(
@LoginName varchar(50), @LoginD int output,
)
AS
Select @LoginID = LoginID From MyDatabase Where (LoginName Is not Null) and @LoginName = LoginName
I am trying to check for a null value in the Stored Procedure. I dont' get an error, but it doesn't catch the "null" and gives an error when there is a null value
What Is the correct wayt to go about it.
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Aug 7, 2014
I want to check when a null value is being inserted in the column in my table using my existing trigger.
At the moment i have eliminated duplicates, but instead of saving the duplicate a null value is placed into the column if there is a duplicate entry.
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Sep 19, 2007
Hello All,
I have a problem and i wish i can get the answers or advices to solve it.
i have like 20 excel files and in each file there is 1 sheet (Planning) . What i need to do is to loop on the on the 20 files (actually this is the easy part and i already done it) the hard part is while looping i need to open each excel file and loop on the 256 columns in it and extract the data from it to a SQL server Database.
Any help will be alot appreciated.
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May 5, 2008
What is the T-SQL command to check for NULL or '' in a field in one statement? I would like to change the following code to be more readable (without the OR).
IF @agent IS NULL OR @agent = ''
Thanks!
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Jul 20, 2005
I have the following view (vProcurementPlan)SELECT dbo.tblProcurementPlan.*, dbo.tblRequisition.RequisitionID ASReqReqID, dbo.tblRequisition.ReqNo AS ReqNo, dbo.tblRequisition.Am AS Am,dbo.tblRequisition.ROS AS ROS,dbo.tblRequisition.ActivityID AS ActivityID, dbo.tblRequisition.ProjectID ASProjectIDFROM dbo.tblProcurementPlan INNER JOINdbo.tblRequisition ONdbo.tblProcurementPlan.RequisitionID = dbo.tblRequisition.RequisitionIDIf I try inserting a record from Access it complains about multiple basetables, I'm happy to write an "instead of" trigger and handle the 5 columnsfrom tblRequisition but as it contains all columns from tblProcurementPlan Idon't want to have to list them separately in any insert or updatestatement.The idea is that a record will be inserted into both tables simultaneouslyupon insert to the view.
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Jun 4, 2008
I was just thinking about a situation...
Let's say hypothetically, I have a textbox, that i would like someone to input their email address to be added to a mailing list. I would like to first check to see if that email address exists in the database, rather than run a sql statement to check, and then run the update command, is it better to run an IFEXIST() type thing in sql and do the code there?
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Jul 21, 2006
Here's a question I though would be common but can't find an answer to!
My select statement, which pulls from SQL Server tables, has a column which allows nulls. When I try to add a parameter to this column, it no longer returns rows that have null in that column when I test it with the default value of %. I want it to return all the records.
SELECT Jobs.JobID, Jobs.JobName, Engineers.Engineer FROM Jobs LEFT OUTER JOIN Engineers ON Jobs.AccountManager = Engineers.ID WHERE (Engineers.Engineer = @Engineer)
Parameter is;ConvertEmptyStringToNull = TrueDefaultValue = %Direction = InputName = EngineerQueryStringField = EngineerSize = 0Type = Empty
When I run this I get no records! Isn't % suppose to return anything including nulls?
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Jun 13, 2006
Why is it that when I include a column from my SQL Server database table, which has it's Allow Nulls checked, in the data source of a control that the record becomes not update-able? How do I get around this?
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Jun 20, 2008
Hi Guys.
I have a problem. I have two feilds in a table. Both of them are (int). I want to be able make sure the same number is not put in both columns for each row. Both colums have to be a different number, and also if one is null, the other cannot be. How do I go about enforcing this policy?
For Example:
This is what I want
ID Column1 Column2
--- -------- ---------
1 5 8
2 5 7
3 null 10
4 6 2
This is what I DO NOT want:
ID Column1 Column2
--- -------- ---------
1 5 5
2 5 5
3 7 7
4 null null
I created a unique constraint between the 2 columns, but it still allows dups within the row. Please help me.
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Apr 3, 2007
Hi there,
I'm trying to unpivot a table in SSIS: The pivoted table basically looks like
ID DATE1 TEXT1 DATE2 TEXT2
----------------------------------
ID1 D1 T1 D2 T2
...
The unpivoted result looks like
ID DATE TEXT
-------------------
ID1 D1 T1
ID1 D2 T2
€¦
It works, but the one problem I am facing is: If D1 IS NULL in the pivoted table then D1 in the unpivoted table contains some strange value that is neither NULL nor a valid datetime. In a data viewer I get the in the DATE field "Fehler: Die Parameter Year, Month and Day beschreiben eine nicht darstellbare Datetime." (i. e. "Error: The parameters Year, Month and Day form an invalid datetime."). The loading of the OLE DB target yields an error because the DATE value cannot be converted to a valid datetime.
Anybody having a solution to this?
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Jan 11, 2006
I have a .net web application and need to create a program that needs to check the database every two hours and if data has not been input send the user an email message. I have heard this can be done via SQL Server - events or triggers? Can anyone tell me where I can find example code or more information on this. Thank you in advance.
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Jun 4, 2007
I am running into an issue when adding data from multiple columns intoone alias:P.ADDR1 + ' - ' + P.CITY + ',' + ' ' + P.STATE AS LOCATIONIf one of the 3 values is blank, the value LOCATION becomes NULL. Howcan I inlcude any of the 3 values without LOCATION becoming NULL?Example, if ADDR1 and CITY have values but STATE is blank, I get aNULL statement for LOCATION. I still want it to show ADDR1 and CITYeven if STATE is blank.Thanks
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Jun 22, 2015
I am facing problem in odbc driver.
Odbc driver:CIW
In ssis i am using ado.net and selecting odbc driver i am giving select statement which is having 100 columns in that 50 columns values are NULLS Its giving error saying Null columns not found.
If i add column s which are non null no error .error with null values.
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Sep 21, 2006
Hi ,
Im trying to build a package that will copy data from excel to SQL
in a program
unfortunately , when I open the package xml file and I drill into the
oledb destination I see that I have no available input columns
what could be the problem ?
thanks ahead
Eran
p.s
the script:
Dim p As Package = New Package()
Dim e As Executable = p.Executables.Add("DTS.Pipeline.1")
Dim thMainPipe As TaskHost = CType(e, TaskHost)
thMainPipe.Properties("Name").SetValue(thMainPipe, "Data Flow")
Dim dataFlowTask As MainPipe = CType(thMainPipe.InnerObject, MainPipe)
' Create excel connection MANAGER
Dim excelCon As ConnectionManager = p.Connections.Add("EXCEL")
excelCon.Name = "ExcelSourceConn"
excelCon.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=e: ry ry ry.XLS;Extended Properties=""Excel 8.0;HDR=YES"""
' Create sqldev connection Manager
Dim sqlCon As ConnectionManager = p.Connections.Add("OLEDB")
sqlCon.Name = "sqldevConn"
sqlCon.ConnectionString = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;User ID=sa;Initial Catalog=InsFocus_Admin_Eran;Data Source=SQLDEVSQLDEV"
''create source component
Dim excelSource As IDTSComponentMetaData90 = dataFlowTask.ComponentMetaDataCollection.New()
excelSource.Name = "ExcelSource"
excelSource.ComponentClassID = "DTSAdapter.ExcelSource.1"
Dim excelInstance As CManagedComponentWrapper = excelSource.Instantiate()
excelInstance.ProvideComponentProperties()
excelSource.RuntimeConnectionCollection(0).ConnectionManager = DtsConvert.ToConnectionManager90(p.Connections(0))
excelInstance.SetComponentProperty("AccessMode", 0)
excelInstance.SetComponentProperty("OpenRowset", "business_codes$")
excelCon.AcquireConnection(Nothing)
'excelInstance.ReinitializeMetaData()
excelInstance.ReleaseConnections()
Dim sqldev As IDTSComponentMetaData90 = dataFlowTask.ComponentMetaDataCollection.New()
sqldev.Name = "sqldev"
sqldev.ComponentClassID = "DTSAdapter.OLEDBDestination.1"
Dim sqldevInstance As CManagedComponentWrapper = sqldev.Instantiate()
sqldevInstance.ProvideComponentProperties()
sqldev.RuntimeConnectionCollection(0).ConnectionManager = DtsConvert.ToConnectionManager90(p.Connections(1))
sqldevInstance.SetComponentProperty("AccessMode", 0)
sqldevInstance.SetComponentProperty("OpenRowset", "business_codes")
sqldevInstance.AcquireConnections(Nothing)
sqldevInstance.ReinitializeMetaData()
sqldevInstance.ReleaseConnections()
Dim path As IDTSPath90 = dataFlowTask.PathCollection.New()
path.AttachPathAndPropagateNotifications(excelSource.OutputCollection(0), sqldev.InputCollection(0))
MsgBox(excelSource.OutputCollection.Count)
'For Each input As IDTSInput90 In sqldev.InputCollection
' Dim vInput As IDTSVirtualInput90 = input.GetVirtualInput
' For Each vColumn As IDTSVirtualInputColumn90 In vInput.VirtualInputColumnCollection
' ' Call the SetUsageType method of the design time instance of the component.
' sqldevInstance.SetUsageType(input.ID, vInput, vColumn.LineageID, DTSUsageType.UT_READONLY)
' Next
'Next
Dim app As Application = New Application()
app.SaveToXml("c:myXMLPackage.dtsx", p, Nothing)
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May 28, 2007
I did make the SQLServer 2005 tutorial, but the LokUp point I see an error "This component has no available input columns". How I can to solve this?
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Dec 22, 2006
Is there a way to preselect the input columns a custom component wanna use. Lets say by DataType (select all of DT_CY for example).
I tried to use the
OnInputPathAttached()
to iterate over the inputColumnCollection and set the UsageType. Didn't worked.
Thanks in advance
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Jul 5, 2006
Hi,
In my data flow taks, The Source data is coming from AS400 has 4 columns,
I need to achieve the followings and require your help.
1. Generate a new column which will be combination of concating these 4 columns.
2. Need to add an extra row for Header & Footer.
Please Help.
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May 29, 2007
I have three input columns from my flat file, defined as follows:
Col_A
Col_B
Col_C
Now, what I want to do is pick the one that is populated, and put it into my table, in the column called
ABC_INPUT
I assume that I want to use a derived column, but how do I filter out columns that contain only NULL values?
Thanks!!
jim work
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May 2, 2007
We are trying to use the Import/export wizard to load a text file to a SQL Server 2005 database. The input file has a variable number of columns per row. For example, the first row has 3 columns, the second has 7, the third has 3, etc. The number of columns varies from 2 to 9 in the input file. The columns are separated by an uptick (`) and the rows are terminated by {CR}{LF}. We are using code page 1252. On processing, the wizard reads the first row (with 3 columns) ok, but then assumes all the other rows have 3 columns and parses the rows accordingly, ignoring the field and row terminators.
The process worked fine with SQL Server 2000. Is there some setting that we are missing, or some configuration on the database that we should be checking?
Thank You
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May 15, 2008
I'm using a Row Count Task to count the number of records passing thru a particular path in my data flow. I created a package variable and referenced this variable in the Components Properties tab in the Row Count Task. I believe this is the minimum I need to do to get the row count.
However, as I explore the other tabs in the editor, I see there is something called Input Columns tab. What is this for? I didn't select anything in there and things are working fine. At first I thought that I had to choose the columns that I want to have available to me for further processing after the Row Count Task, but this isn't the case. I am able to see all my columns coming out of the Row Count Task even tho I didn't do anything in the Input Columns tab.
So, what is this setting for?
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Oct 17, 2007
Can anyone please help
I am trying to get a table from production to development created and populated with data in Prod. When I create a package to set the data flow on the available input columns in mappings I do not see any columns there. The source has been defined as the production table.
Thanks a bunch
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Jan 23, 2008
Is there by chance a cunning way to make the input columns automatically populate the output of an asynchronous script transformation?
My transformation writes several rows for each input row read. I'm creating some new columns along the way but I'd like all of the input columns to get output each time also. However I can't see any obvious way to achieve this, short of manually defining each column to the output and populating it in the script.
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Dec 14, 2007
I have set up a script task in one of my packages that I have set up to modify another package right before running it. This package is nothing more than a data flow task that transfers rows via an sql command from one table into another. The strange thing is I have gotten it to work with some tables but not with others. T
he script bombs out in the loop where i map all of the columns found below, where i use MapInputColumn with the error HRESULT: 0xC0010009 On Microsoft.SqlServer.Dts.Pipeline.Wrapper.IDTSExternalMetadataColumnCollection90.get_Item(Object Index)
The thing is this happens after looping roughly 55 times but there are still about 100 columns that it needs to loop through still.
Code Block
Dim input As IDTSInput90 = data_destination.InputCollection(0)
Dim virtual_input As IDTSVirtualInput90 = input.GetVirtualInput
Dim input_column As IDTSInputColumn90
Dim virtual_column As IDTSVirtualInputColumn90
' Iterate through the virtual input column collection and map field names
For Each virtual_column In virtual_input.VirtualInputColumnCollection
input_column = inst_data_destination.SetUsageType(input.ID, virtual_input, virtual_column.LineageID, DTSUsageType.UT_READONLY)
inst_data_destination.MapInputColumn(input.ID, input_column.ID, input.ExternalMetadataColumnCollection.FindObjectByID(virtual_column.Name).ID)
Next
Just for kicks i removed the mapping portion of the code and left in the SetUsageType to see if it would update the available input columns in the destination. The script will then finish successfully but still only the 55 or so fields out of 155 are available in the input. So i then stepped through the script with the mapping portion still disabled and after it loops successfully, i call reinitialize meta data and it produces an error in the input_column variable: HRESULT: 0xC0047041.
I find it odd that this still reports to me that the script finished successfully and I also find it odd that this works fine on two other tables I've tested but not this one. Any insight would be greatly appreciated.
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Nov 20, 2006
Hi, all experts here,
Thank you very much for your kind attention.
I got a strange problem with SQL Server 2005 data mining models though. I have selected the input columns for my mining model (which are different from the input columns for its mining structure, since I ignored some of the columns for the selected model). But the mining model still used all input columns from the mining structure rather than those I chose for the mining model.
Would please any one here give me any guidance and advices for that. Really need help for that.
Thanks a lot in advance for any help.
With best regards,
Yours sincerely,
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Dec 22, 2006
Hi,
In a SSIS Data flow task, whatever you are doing with the input columns that come from a Data source like a Flat File Source, these columns are always visible and available as input columns for all Transformation and Destination components in the Data flow.
Our Custom Component is a column mapping component that transforms many input columns into many oputput columns and we would like that the used input columns are not available anymore to the downstream components...
Is that possible?
I saw that with the Unpivot component it is possible to make some input columns unavailable to downstream components...So I think there is a way to do the same in a custom component...
Thanks for any help,
David
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Dec 12, 2007
I am building an SSIS package that loops through a table in SQL Server and dynamically builds a select statement that i would like to use as an ole db source. I have been having a difficult time with this as the select statement that i am generating is over 200,000 characters long so using an sql variable is out of the question.
I ended up placing the select statement into a table where each row of the table represents a piece of the select. I then use an execute_sql task that selects the entire rowset from this table into a variable object. I then use a for each loop to shred the variable and concatenate it into on big string variable called user:: sql_statement that is my select.
After setting up the loop and testing to see if the user:: sql_statement variable populates correctly i then added a data flow transfer with an ole db source and destination. I then go into the advanced editor for the source and set it to accept an sql statement from a variable and use my user:: sql_statement variable. I was forced to set validate external metadata option to false to avoid an error since there is no way to validate the columns until the for each loop runs during run time.
Now thats all fine and good but what is causing my problem is that during run time, when the package gets to the data flow task, the select statement doesn't seem to be populating the input columns of the data source. I have been searching to no avail on a way to tell the data source to update the input columns but every time it gets there, the package bombs out telling me the ole db source has no available output columns.
Specifically the error i get is :
[DTS.Pipeline] Error: "output "OLE DB Source Output" (6616)" contains no output columns. An asynchronous output must contain output columns.
Any help with this would be much appreciated.
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Apr 17, 2008
Hi,
i have a table like below
table:-
id col2 col3 col4 col5 col6
1 2 3 4 5 6
2 5 8 4 7 6
3 4 8 2 6 9
4 2 5 8 6 3
5 6 9 5 5 9
i want to write a stored procedure where i pass column names a parameters and i want to get result based on that
For ex:-
if i pass the parameters as
col3 and col5 where id =1 then i should the result as
id col3 col4 col5
1 3 4 5
and if i pass input as col2and col6 where id =3, the result should be
id col2 col3 col4 col5 col6
3 4 8 2 6 9
can anyone help on this??
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Nov 26, 2007
I'm trying write a reusable script component that takes data from rows that were rejected from a SQL Destination operation and put them into a common SQL error table.
This script would basically function to take the input columns selected in the script, and build a delimited string, (similar to the 'Flat File Source Error Output' that is contains redirected rows from reading a flat file) and insert this string into a SQL table called 'SourceData' to store errors.
I'm trying to script the component to iterate through all input columns (as selected in the input columns screen) and build a simple string.
Code Block
Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)
'Use the incoming error number as a parameter to GetErrorDescription
Row.ErrorDescription = ComponentMetaData.GetErrorDescription(Row.ErrorCode)
Try
Row.ErrorColumnName = ComponentMetaData.InputCollection(0).InputColumnCollection(Row.ErrorColumn).Name
Catch ex As Exception
Row.ErrorColumnName = String.Concat("Column Name retrieval failure. Details", ex.Message)
End Try
'
'Build input data
'
Dim inData As String
For Each inputCol As IDTSInputColumn90 In ComponentMetaData.InputCollection(0).InputColumnCollection
inData = String.Concat(inData, "~", inputCol.Name) 'I don't want the name, but the value.
Next
Row.SourceData = inData
'
End Sub
I've only got as far as iterating the names of columns in the input buffer, but how do i get the values?
The result i'm trying to achieve is :
Selected columns in 'Input Column' screen : Name, Address, Phone
OutPut column 'SourceData' value : Harry~Melbourne~None
I don't want to write the code as:
Code Block
inData = Row.Name
indata = String.Concat(inData,"~",Row.Address)
indata = string.concat(inData,"~",Row.Phone)
as this make my code not very reusable. I've got some tables which are 100+ columns long and I don't wish modify the code too much
I have also tried overriding the ProcessInput() function of the script component to iterate through the buffer columns :
Code Block
Public Overrides Sub ProcessInput(ByVal InputID As Integer, ByVal Buffer As Microsoft.SqlServer.Dts.Pipeline.PipelineBuffer)
MyBase.ProcessInput(InputID, Buffer)
Dim iCnt As Integer = 0
Dim inData As String
If Buffer.ColumnCount > 0 Then
For iCnt = 0 To Buffer.ColumnCount - 1
inData = String.Concat(Buffer.Item(iCnt)) 'Error thrown here: PipelineBuffer has encountered an invalid row index value.
Next
End If
End Sub
but i get an error when i run it.
Please help.
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Jan 22, 2008
Hi All,
I want to run a loop for all the input columns in the script component. My requirement is, I have nearly 50 columns in the input columns list. For each row and for each column I need to do some operation. How Can I run a loop for each column. Please note in the script component I need to get the column names in the middle for some operations. Please see below.
Process Each Input Row
For each column in Input column list
....
....
If column.Name Starts with "Test" then set NULL to the column value
....
....
End Loop
End Loop for each input row
Can anybody tell me how can I do that.
Regards
Venkat.
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Apr 14, 2015
In SSIS I use the DQS Cleansing transformation component. I've got a knowledge base (KB) in place and this KB holds various domains and my data source has more input columns than would like to use for a particular clean up operation. I want to use some of the input columns to map against some domains in the KB. It is my understanding that it should be possible to select only the required input columns, but all i can do is select all input columns.
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